Samsung note 20 ultra 5g not working

My Akg USB c headphones are not getting detected when they are connected to phone and the music starts get playing on the speakers.Also when my phone is connected to PC visa USB, it is not getting recognised on the laptop, Also OTG is not working on...

Headphone not working not 10 +

AFTER UPDATING ONE UI4.1 ANDROID 12 HEADPHONE STEREO NOT WORKING ONLY MONO SOUND IS THERE.